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Start at 32 all around. Measure all of your tire pressures at the end of every session and bleed air to 38 psi (you don’t want them running over 40 psi when hot on the track). PSS go up quite a bit with tracking (I used them a couple weekends when first learning the car) and they would increase 8-10 psi with 20 minute sessions at an ambient outdoor temp of 60s-70s.
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